Sophia Global Remanufactured Ink Cartridge Replacement for Dell MK992 and MK993 Series 9 (2 Black, 2 Color) Backed by a 100% Guarantee and a Two-Year Warranty ISO 9001 Quality Certified Manufacturing Process Page Yield: Up to 450 pages each black, Up to 300 pages each color These MK992 & MK993 cartridges were professionally remanufactured in an ISO 9001 factory. These cartridges were used once and then sent to our factory where they underwent an extensive process including, cleaning, testing the chip, and ink refilling. Before being sealed, the cartridges were tested in a live printer to ensure crisp text and true color reproduction. The cartridges were finally sealed and placed in a static protective bag.